ubuntu 20.04 in ci

Signed-off-by: Robin Appelman <robin@icewind.nl>

.github/workflows/lint.yml

@@ -3,7 +3,7 @@ on: [push, pull_request]
 
 jobs:
   php-linters:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         php-versions: ['7.3', '7.4', '8.0']
@@ -23,7 +23,7 @@ jobs:
 
   php-cs-fixer:
     name: php-cs check
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout
         uses: actions/checkout@master

.github/workflows/release.yml

@@ -8,7 +8,7 @@ on:
 jobs:
   release-binaries:
     name: Build release binaries
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         target:

.github/workflows/rust.yml

@@ -5,7 +5,7 @@ name: CI
 jobs:
   check:
     name: Check
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
@@ -20,7 +20,7 @@ jobs:
 
   build:
     name: Build
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         target:
@@ -49,7 +49,7 @@ jobs:
 
   test:
     name: Tests
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
 
     steps:
       - uses: actions/checkout@v2
@@ -66,7 +66,7 @@ jobs:
 
   build-test-client:
     name: Build test client
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
 
     steps:
       - name: musl-tools
@@ -89,7 +89,7 @@ jobs:
 
   msrv:
     name: Check MSRV
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1

.github/workflows/static-analysis.yml

@@ -3,7 +3,7 @@ on: [push, pull_request]
 
 jobs:
   static-psalm-analysis:
-      runs-on: ubuntu-latest
+      runs-on: ubuntu-20.04
       strategy:
           matrix:
               ocp-version: [ 'dev-master' ]